1) The ICU plan proposed by Keynes in 1944 involved establishing an international clearing union that would issue a global reserve currency called bancors and manage countries' trade balances.
2) Under the ICU plan, countries would deposit bancors from trade surpluses into a national account and withdraw them for trade deficits, facing penalties if their balances exceeded a certain threshold.
3) The goal was to incentivize balanced trade by recycling trade surpluses from some countries into productive investments in others, in order to prevent severe global trade imbalances and financial crises.